. >> brown: and i'm jeffrey brown. on the "newshour" tonight, we update the investigation, both in the u.s. and abroad, into the two brothers believed to be behind the blasts, as the youngest remains hospitalized in serious, but stable condition. >> ifill: and we explore the legal questions raised by trying dzhokhar tsarnaev in federal court. >> brown: then, ray suarez gets an update on guantanamo bay, where more than half the prisoners are now on a hunger strike, protesting their indefinite detentions. >> ifill: paul solman has the story of older workers starting new businesses late in life. >> if you're smart and you realize you're getting older, well then, get into a business where you leverage the younger people and eventually you become the great gray god. >> brown: and judy woodruff looks into the trial of kermit gosnell-- the philadelphia abortion doctor accused of eight counts of murder. >> ifill: that's all ahead on tonight's "newshour." >> major funding for the pbs newshour has been provided by: ♪ ♪ movin